Ncert-class 11-chemistry – unit 8-Organic Chemistry – Some Basic Principles and Techniques Welcome to your Ncert-class 11-chemistry - unit 8-Organic Chemistry – Some Basic Principles and Techniques 1. The trends in physical properties of compounds within a homologous series are due to: functional group change in weight Both change in size and change in weight change in size None 2. Group showing strongest +M effect:$$-O^{-}$$ $$-NHCH_{3}$$ $$-O^{-}$$ $$-N(CH_{3})_{2}$$ $$-NH_{2}$$ None 3. Which one of these shows least -I effect: $$-NO_{2}$$ $$-NH_{3}^{+}$$ $$-F$$ $$-OH_{2}^{+}$$ None 4. Given two compounds, one more polar than the other, which one will move up the silica stationery phase higher than the other in TLC? Non polar compound Both will move equally None will move Polar compound None 5. Carbon and hydrogen are detected by heating the organic compound with ________. cupric oxide zinc oxide sulphur dioxide magnesium oxide None 6. The most common characteristics of homologous series is increase in the number of: methyl units methylene units propyl units butyl units None 7. Which of the following is a characteristic of homologous series? All the members have same functional group Both All the members can be represented by same general formula and All the members have same functional group All the members show different chemical properties All the members can be represented by same general formula None 8. In which of the following case does withdrawing effect dominates donating effect? -Cl -NHCH3 -OCH3 -OH None 9. Which term is the best match for the color of a chemical substance students make note of: qualitative data observation inference quantitative data None 10. Homologous series is____________. a series of compounds with same molecular formula and different structural formulae. a series of compounds in which the same functional group substitutes for hydrogen in a carbon chain. a series of compounds with same molecular formula but different functional groups. a series of compounds in which different functional group substitutes for hydrogen in a carbon chain. None 11. The order of -I effect of orbitals is: 𝑠𝑝³>𝑠𝑝²>𝑠𝑝 𝑠𝑝² >𝑠𝑝>𝑠𝑝³ 𝑠𝑝² >𝑠𝑝³>𝑠𝑝 𝑠𝑝>𝑠𝑝² >𝑠𝑝³ None 12. In which of the following inductive effect is possible: Butanal Benzene Butane Cyclohexane None 13. 2𝐻+𝐶𝑢𝑂→𝑋+𝑌2The compound 𝑋X and 𝑌Y are: H_{2},Cu $$H_{2},CuO$$ Both None $$H_{2}O,Cu$$ None 14. The compound of the molecular formula, $$C_{6}H_{14} $$has two tertiary carbons. Its IUPAC name is: 2 , 3 −dimethylbutane 2 − methylpentane n-hexane 2 , 2 −dimethylpentane None 15. In the detection test of carbon and hydrogen with cupric oxide, carbon is oxidized to : carbonic acid copper sulphate carbon monoxide carbon dioxide None 16. Among the following which has greatest -I effect? -NO2 -F -OH -NH2 None 17. Groups that can show both +M and -M effect: vinyl All of these -NO phenyl None 18. In the detection test of carbon and hydrogen with cupric oxide, hydrogen is oxidized to __________. methane hydride water lime water None 19. Carbon present in the compounds is oxidised to carbon dioxide which: turns lime water milky turns solution to green turns blue litmus red has no effect on solution None 20. Which of the following is the best evidence for the validity of a proposed reaction mechanism? The same mass of catalyst is present at the end of the reaction as it was at the beginning. The product proposed by the mechanism was formed. An experimenter found spectrophotmetric data consistent with the presence of a reaction intermediate in the proposed mechanism. Reaction rate data suggests that the rate of the reaction is approximately what is expected. None Time's up Please Share This Share this content Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Leave a Reply Cancel replyCommentEnter your name or username to commentEnter your email address to commentEnter your website URL (optional) Save my name, email, and website in this browser for the next time I comment.
